Mechanical movement



Jan. 2, 1951 E. P. BULLARD, m 2,536,624

MECHANICAL MOVEMENT Original Filed June 24, 1944 IN V EN TOR.

EDWARD PBuLLAFmlZZ Patented Jan. 2, 1951 Edward P. Bullard, III, Fairfield, Comm, as'signor to The Bullard Company, a corporation of Connecticut Original application April 5, 1945, Serial No. 586,799, which is a division of application Serial No. 541,986, dated June 24, 1944. Divided and this application February 27, 1948, Serial No.

4 Claims.

This invention relates to the art of mechanical movements and particularly to apparatus for accurately moving a member in space to an exact location. This is a division of application Serial Number 586,799, filed April 5,1945, now Patent No. 2,511,821, which itself is a division of application Serial Number 541,986, filed June 24, 1944, now Patent No. 2,528,736, all in the name of Edward P. Bullard, III.

The principal object of this invention is to provide apparatus for accurately locating a member in space; and the provision of apparatus for accurately adjusting a supporting member over a limited range of movement on which is mounted an element that can be moved with facility along said member to a point within said limited range.

The above, as well as other objects and novel features of the invention will become apparent from the following specification and accompanying drawing, in which:

The single figure discloses apparatus to which the principles of the invention have been applied.

Referring to the drawing, the principles of the invention have been shown as applied to a switchtripping dog and mounting therefor. members It! and H are mounted in fixed spaced relation on a su port (not shown). be spaced a distance equal, or proportional to the length of the path of travel of a member, the movement of which is to be controlled. A dog I2 is employed to actuate an electrical switch (not shown), and is mounted for free sliding movement on a wire l3 that is stretched between the members [9 and II. The wire l3.is mounted for limited axial movement relativelyto the members l and II. It includes a threaded end It on which a nut I5 is mounted. A spring I6 is compressed between the member IO and the nut l5 thereby resiliently urging the wire l3 rightwardly as shown in the drawing. The opposite end of wire I3 is provided with a micrometer thread I! on which is threaded a nut 18. The nut may be provided with equally spaced divisions about its periphery that cooperate with an index scratch on the member ll.

A secondary wire I9 is stretched between members l0 and II, and passes throughthe dog I 2 in parallel relation with wire l3. This construction provides rigidity to the mounting of dog l2 and maintains it in its correct angular position relatively to wire [3. Set screws 20. 2| are provided in the dog I2 for rigidly securing it to the wire l3.

The above-described apparatus makes it possible to very accurately locate a member in space Frame They may.

with ease and facility. The principles of the invention are particularly applicable where a large number of such dogs H are located within a relatively small space, such as, for example, as is shown in the parent application above-referred to. Furthermore, slight inaccuracies in the setting of dog l2 can easily be overcome by simply turning the micrometer head in the correct direction. The spring I6 functions at all times to insure proper movement of the supporting wire [3 as dictated by the operation of nut [8.

Although the principles of the new apparatus have been shown and described in detail to fully disclose one embodiment of the invention, it will be evident that certain features may be used without others, without departing from the principles of the invention.

What is claimed is:

1. Apparatus comprising in combination, a supporting rod; 2. frame for holding said supporting rod; a member slidably mounted on said supporting rod and adapted to be releasably fixed to said supporting rod at any point therealong within the confines of said frame; a micrometer head threaded to one end of said rod and adapted to abut against said frame; and resilient means normally urging said micrometer head against said frame.

2. Apparatus comprising in combination, a frame; a fixed guide rod mounted in said frame; a member slidably mounted on said guide rod; another rod mounted in said frame, extending through said member; means for releasably fixing said member to said other rod; a micrometer head threaded to one end of said other rod and adapted to abut against said frame; and resilient means normally urging said micrometer head against said frame.

3. In an electrical switch-tripping device, a frame; a wire supported by said frame; an axially-extending micrometer nut threaded to one end of said wire and abutting one side of said frame; a pre-loaded compression spring surrounding said wire at its other end and abutting another side of said frame; and a tripping element slidably mounted on said wire and adapted to be fixed thereto at different locations therealong.

4. In an electrical switch-tripping device, a frame; a wire supported by said frame; an axially-extending micrometer nut threaded to one end of said wire and abutting one side of said frame; a pre loaded compression spring surrounding said wire at its other end and abutting another side of said frame; a second wire supported by said frame in parallel relation to said first wire; and a tripping element slidably mounted on said wires and adatped to be fixed to said first-mentioned wire at different location therealong.

EDWARD P. BULLARD, III.

REFERENCES CITED UNITED STATES PATENTS Number Name Date Fay Sept.23, 188$ Moores Jan. 4, 1910 Lamphere July 23, 1918 Simpson Aug. 2, 1927 Shaw June 11, 1929 

